dare

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To have the courage required for.
• intransitive verb To challenge (someone) to do something requiring boldness.
• intransitive verb To confront boldly; brave: synonym: defy.
• intransitive verb To be courageous or bold enough to do or try something.
• intransitive verb To be courageous or bold enough to.
• noun An act of daring; a challenge.

from The Century Dictionary.

• To be bold enough (to do something); have courage, strength of mind, or hardihood (to undertake some action or project); not to be afraid; venture: followed by an infinitive (with or without to) as object, or sometimes, by ellipsis, used absolutely.
• [Originally and still often used in the third person of the present tense without a personal termination, and in such case always followed by the infinitive without to: as, he dare not do it.
• To venture on; attempt boldly to perform.
• To challenge; provoke to action, especially by asserting or implying that one lacks courage to accept the challenge; defy: as, to dare a man to fight.
• To arouse; rouse.
• noun The quality of being daring; venturesomeness; boldness; dash; spirit.
• noun A challenge; defiance.
• noun A mirror for daring larks.
• noun Same as dace, 1.
• noun A Middle English form of deer.
• To be in fear; tremble with fear; be stupefied or dazed with fear. Specifically
• To lie still in fear; lurk in dread; especially, lie or squat close to the ground, like a frightened bird or hare; look anxiously around, as such a lurking creature.
• To droop; languish.
• To strike with fear; terrify; daunt; dismay.
• To terrify and catch (larks), as by means of a mirror or a piece of red cloth, or by walking round with a hawk on the fist where they are crouching, and then throwing a net over them.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb To have adequate or sufficient courage for any purpose; to be bold or venturesome; not to be afraid; to venture.
• transitive verb To have courage for; to attempt courageously; to venture to do or to undertake.
• transitive verb To challenge; to provoke; to defy.
• noun rare The quality of daring; venturesomeness; boldness; dash.
• noun Defiance; challenge.
• intransitive verb obsolete To lurk; to lie hid.
• noun (Zoöl.) A small fish; the dace.
• transitive verb obsolete To terrify; to daunt.
• transitive verb to catch them by producing terror through to use of mirrors, scarlet cloth, a hawk, etc., so that they lie still till a net is thrown over them.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A small fish, the dace.
• verb intransitive To have enough courage (to do something).
• verb transitive To defy or challenge (someone to do something)
• verb transitive To have enough courage to meet or do something, go somewhere, etc.; to face up to
• noun A challenge to prove courage.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb to be courageous enough to try or do something
• verb challenge
• noun a challenge to do something dangerous or foolhardy
• verb take upon oneself; act presumptuously, without permission